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arendst/Tasmota

Alternative firmware for ESP8266 and ESP32 boards that adds web-based setup, OTA updates, local automation and MQTT, HTTP, Serial or KNX control.

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What is it?

Tasmota is open-source firmware that replaces the stock software on ESP8266 and ESP32 based smart devices such as plugs, switches, bulbs and sensor boards. Devices are configured through a built-in web UI, updated over the air, and automated with Rules, Timers and the Berry scripting language.

It can control devices locally over MQTT (v3.1.1 or v5, including TLS connections to AWS IoT Core or Azure IoT Hub), HTTP, Serial or KNX, and integrates with Home Assistant, Domoticz, openHAB and Node-RED. On ESP32 it also supports Matter, Zigbee coordination, BLE gateway functions and LVGL touchscreen UIs.

The project covers more than 150 sensors and peripherals over I2C, SPI, 1-Wire and analog, plus lights, shutters, thermostats, smart meter interfaces, infrared, RF and Modbus bridging. Some features exceed the flash size of the precompiled binaries and require building a custom firmware image.

Key features

  • 01Web UI configuration and over-the-air firmware updates
  • 02MQTT, HTTP, Serial and KNX control, with Home Assistant and Node-RED integration
  • 03Rules, timers and Berry scripting for on-device automation
  • 04Support for 150+ sensors and peripherals over I2C, SPI, 1-Wire and analog
  • 05Matter, Zigbee and BLE support on ESP32 boards

Use cases

  • Adding local, cloud-free control to cheap Wi-Fi plugs and switches
  • Building a home sensor network that reports temperature, CO2 or energy data to Home Assistant
  • Controlling LED strips, shutters or infrared appliances from a smart home hub
  • Making battery-powered ESP devices report data with deep sleep

Quick start

  1. 1

    Install via the Tasmota WebInstaller in your browser

  2. 2

    Or download a released binary from ota.tasmota.com and flash it using the Getting Started guide

Things to know

  • Runs only on ESP8266 and ESP32 family boards, so it needs compatible hardware.
  • Some features do not fit in the precompiled binaries and require compiling your own build.
  • Major version upgrades may require following a documented migration path, and minimal versions can fail to OTA-update.
  • Licensed under GPL-3.0, a copyleft license that requires derivative works to remain open source.

In collections

Embedded systems & microcontroller projects

Topics

#iot#smart-home#esp32#esp8266#firmware#mqtt#home-automation#embedded#arduino#automation

FAQ

What is Tasmota?
Alternative firmware for ESP8266 and ESP32 boards that adds web-based setup, OTA updates, local automation and MQTT, HTTP, Serial or KNX control. Tasmota is open-source firmware that replaces the stock software on ESP8266 and ESP32 based smart devices such as plugs, switches, bulbs and sensor boards. Devices are configured through a built-in web UI, updated over the air, and automated with Rules, Timers and the Berry scripting language.
Is Tasmota free to use? What license does it have?
Tasmota is open source under the GPL-3.0 license. Check the license terms before using it in commercial products.
Is Tasmota still maintained?
Actively maintained. The last commit to Tasmota was on Nov 7, 2026.
What can I use Tasmota for?
Adding local, cloud-free control to cheap Wi-Fi plugs and switches Building a home sensor network that reports temperature, CO2 or energy data to Home Assistant Controlling LED strips, shutters or infrared appliances from a smart home hub Making battery-powered ESP devices report data with deep sleep
How do I install Tasmota?
Install via the Tasmota WebInstaller in your browser Or download a released binary from ota.tasmota.com and flash it using the Getting Started guide
Where can I get Tasmota?
The source code and installation instructions are on GitHub: https://github.com/arendst/Tasmota

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